import Vue from 'vue'
import VueRouter from 'vue-router'

// 将以下路由的加载方式全部修改成了懒加载
// import Login from './components/Login.vue'
const Login = () => import(/* webpackChunkName: "login_home_welcome" */ './components/Login.vue')
// import Home from './components/Home.vue'
const Home = () => import(/* webpackChunkName: "login_home_welcome" */ './components/Home.vue')
// import Welcome from './components/Welcome.vue'
const Welcome = () => import(/* webpackChunkName: "login_home_welcome" */ './components/Welcome.vue')

// import Users from './components/user/users.vue'
const Users = () => import(/* webpackChunkName: "Users_Rights_Roles" */ './components/user/users.vue')
// import Rights from './components/power/Rights.vue'
const Rights = () => import(/* webpackChunkName: "Users_Rights_Roles" */ './components/power/Rights.vue')
// import Roles from './components/power/Roles.vue'
const Roles = () => import(/* webpackChunkName: "Users_Rights_Roles" */ './components/power/Roles.vue')

// import Cata from './components/goods/Cate.vue'
const Cata = () => import(/* webpackChunkName: "Cata_Params" */ './components/goods/Cate.vue')
// import Params from './components/goods/Params.vue'
const Params = () => import(/* webpackChunkName: "Cata_Params" */ './components/goods/Params.vue')

// import GoodsList from './components/goods/list.vue'
const GoodsList = () => import(/* webpackChunkName: "GoodsList_Add" */ './components/goods/list.vue')
// import Add from './components/goods/Add.vue'
const Add = () => import(/* webpackChunkName: "GoodsList_Add" */ './components/goods/Add.vue')

// import Order from './components/order/Order.vue'
const Order = () => import(/* webpackChunkName: "Order_Report" */ './components/order/Order.vue')
// import Report from './components/report/Report.vue'
const Report = () => import(/* webpackChunkName: "Order_Report" */ './components/report/Report.vue')

Vue.use(VueRouter)

const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' }, // 将 / 重定向到 /login
    { path: '/login', component: Login },
    {
      path: '/home',
      component: Home,
      redirect: '/welcome',
      children: [
        // 在 home 页面中嵌套的子路由
        { path: '/welcome', component: Welcome },
        { path: '/users', component: Users },
        { path: '/rights', component: Rights },
        { path: '/roles', component: Roles },
        { path: '/categories', component: Cata },
        { path: '/params', component: Params },
        { path: '/goods', component: GoodsList },
        { path: '/goods/add', component: Add },
        { path: '/orders', component: Order },
        { path: '/reports', component: Report }

      ]
    }

  ]
})

// 挂载路由导航守卫(在开发项目阶段先不开启路由导航守卫方便编程调试)
router.beforeEach((to, from, next) => {
  // to 表示将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数，next() 表示放行，next('/login') 表示强制跳转
  if (to.path === '/login') return next()
  // 获取 token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
